Collapsible core.



I. YEMIKER OOLLAPSIBLE CORE. APPLICATION FILED APR 19. 1913.

Pawnted Aug". 38, 191%.

sections together without the use of bolts and warren snares PATENT@FFME.

JOHN YEMIKER, or AKRON, OHIO.

coLLAPsIB E cons.

Specification of Letters Patent. Patented Aug, 18, 19314, Applicationfiled April 19, 1913. Serial No. 762,442.

is composed of a plurality of separable sections which are segmental inform and tubular. In the present instance, there are four of thesesections employed, designated 1, 2, 3 and 4, although it is to beunderstood that the invention is not limited in this regard.

ny desired number of sections of the core (the section 4 in the presentinstance), has its ends disposed in a plane oblique to the radii of theannular body of the core, the inner portion of such-section being ofgreater length than the outer or peripheral portion, whereby the member4 will serve in the nature of a key and may be readily moved inward outof engagement with the-obliquely arranged end of the adjacent sections 1and 3 when it is desired to collapse the core preparatory to removing itfrom the molded tire casing. The abutting ends of the sections 1, 2 and3 may be radially disposed because these sections may be readily removedfrom the tirecasing after the key section a has been removed. Each of.the sections which together form the body of the core, is formed on itsinner side with a segmental flange, the ends of said flanges when thesections are assembled, abutting against each other to constitute anannular bead 5 which is adapted to be engaged by the improved clampingmeans of this invention. Preferably the bead 5 is laterally extended.That is, it is wider than the web 6 which joins it to the main portionof the core body, as best illustrated in Fig. 2.

In order to hold the core sections rigidly in assembled relation to eachother, I form the bead 5 in one side with an annular recess 7 in whichis designed to fit the laterally extending flange 8 of a one piece orcontinuous and unbroken annulus 9, said annulus abutting against therecessed side of the bead and extending inwardly within the margin ofthe inner wall of the bead, as clearly illustrated in Fig. 2.

Mounted within the circle of the bead 5, is an expanding member in theform of a split ring 10, said ring being preferably substantially thesame Width as the bead, although this is not essential, and beingprovided on its outer surface with an outwardly projecting annularflange 11 which is designed to fit-within a recess 12 formed in thatside of the bead 5 where the recess 7 is also formed. It will thus beunderstood that To all whom it may concern: 7

Be it known that I, JOHN YEMIKER, a citizen of the United States,residing at Ak ron, in the coun'tyof Summit and State of @hio, haveinvented certain new and useful Improvements in Collapsible Cores, ofwhich the following is a specification, reference being bad totheaccompanying drawings.

This invention comprehends certain new and useful improvements incollapsible cores or mandrels, the present invention relatingparticularly to a collapsible core for use in molding rubber tires oranalogous articles.

The invention has for its primary object an improved collapsible coreembodying an improved means for uniting its members or nuts.

A further object of the invention is a simple, durable and eflicientcollapsible core, the parts of which may be readily assembled and heldrigidly in operative relation to each other by means of an expansiblering designed to exert a radial pressure on the core sections in anoutward direction against the reaction of a rigid and continuous annulusextending around one side faceof the core. And the invention also aimsto generally improve devices of this class so as to render tllem moreuseful and commercially desira le.

With these and other objects in view, as will more fully appear as thedescription proceeds, the invention consists in certain constructions,combinations and arrangements of the parts that I shall hereinafterfully describe and claim.

For a full understanding of the invention, reference is to be had to thefollowing description and accompanying drawing, in which:-

Figure 1 is a side elevation of my improved collapsible core, partsbeing broken away. Fig. 2 is a transverse sectional view on the line 22, of Fig. 1. Fig. 3 is a similar view on the line 33, of Fig. 1. .Fig.4 is .a fragmentary view illustrating a modificationhereinafterspecifically referred to.

Corresponding and like parts are referred to in the followingdescription and designated in the accompanying drawing by like referencecharacters. l

The body of my improved collapsible core bled with their ends abuttingand web, 7 a the annular recess lus 9. Obviously,

the annulus 9 overlaps one side of the expanding ring 10. As just abovespecified, the ring 10 is split and where the ends come together, orapproximately so, I insert a taper key or screw l2 the' same being in-14 designed to receive dowel keys 15 for the purpose of preventing thesections from having any side motion and from becoming accidentallydisplaced by such motion.

From the foregoing description in connection with the accompanyingdrawing, the

operation of my improved collapsible core will be apparent.

In the practical use of the device, after the sections of the core bodyhave been assem the dowel keys 15 inserted in place, the side annulus 9is placed in position, as is also the expanding ring 10, and the wedgemember 12 is then driven or worked into place, whereby the ring 10 willbe expanded and the core sections pressed outwardly into firm relationto each other and will thus be held rigidly connected one to the otherby the ex anding ring 10 and the correlated action the annulus 9.

It will thus be seen that I have provided a very simple construction ofcollapsible core, the parts of which may be very readily assembled andin a simple and efiicient manner. It will be noted that the recess 7 inthe side face of the bead 5 is formed at the juncture of the bead withthe web 6, whereby the flange 8 will lie in the same transverse plane asthe shoulder which is formed at the juncture of the opposite orunrecessed.

side of the core and the web.

In that form or embodiment of my invention illustrated in Fig. 4, 6designates the therein and 8 the laterally extending flange of the onepiece or continuous and unbroken annulus 9. l0 designates the splitring, 11 the annular flange thereof and 13 the aperture in the annulus 9through which is inserted to expand the ring This embodiment of thedevice difiers from that illustrated in Figs. 2 and 3 by having theannular flange 8 formed with an extension 16 fitting within the annularrecess 7*, said recess being set in from the juncture of the web 6 andthe lateral enlarged or widened ead 5 This makes a strong construction,

scope oi: the invention,

the wedge pin 12 amass? leaving more solid metal in the body of the web,but it is to be understood that this form is an alternative of the otherform and that both forms come within the purview or scope of myinvention.

While the accompanying drawings illustrate what I believe to be thepreferred forms of my invention, it is to be understood that theinvention is not limited thereto, but that various changes may be madein the construction, of the appended claims.

- What I claim is 1. A collapsible core including a pluralityarrangements and proportions arts without departing from the as definedin the of separable segmental sections adapted to abut one against theother to form the circular body of the core, said sections beingtogether provided with an inwardly extending annular bead, said beadbeing formed in' a rigid one side with an annular recess, annulusabuttin against the recessed side of the bead and iormed with alaterally projecting annular flange fitting in said recess, anexpansible split ring mounted within the circle of the bead and.engaging the same, and means for-expanding said ring.

2. A collapsible core including a plurality of segmental sectionsarranged in abutting relation to each other whereby to produce acircular structure, said sections being together formed with an inwardlyprojecting annular bead, said bead being formed in one side with anannular recess, a rigid and unbroken annulus engaging one side face ofthe bead and formed with a laterally projecting annular flange fittingin said recess, an expansible split ring fitting within the circle ofsaid bead, and means for expanding said ring against the bead, theannulus projecting inwardly over and contacting with one side face ofsaid ring.

3. A collapsible core, includinga plurality of separable segmentalsections arranged in abutting relation to each other to produce acircular structure, said sections being together provided with aninwardly projecting annular bead, said bead being formed in one sidewith outer and inner grooves, an annulus engaging the recessed annularside of the bead and formed with a laterally flange fitting within theformed in one side with an annular recess,

a rigid and unbroken annulus engaging one

